@media only screen
  and (min-device-width: 320px)
  and (max-device-width: 568px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) {
    .midscreen {
        margin-top: -48vmin;
    }
}

/* iphon 678 */
/* Portrait */
@media only screen
  and (min-device-width: 375px)
  and (max-device-width: 667px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) {
    .midscreen {
        margin-top: -48vmin;
    }
}

/* iphon 678+/x */
/* Portrait */
@media only screen
  and (min-device-width: 375px)
  and (max-device-width: 812px)
  and (-webkit-min-device-pixel-ratio: 3)
  and (orientation: portrait) {
    .midscreen {
        margin-top: -44vmin;
    }
}